Because majority of world's population will not negotiate a deal if it's not in person.
I've found that to be quite untrue. Negotiation works fine over video. The final meeting to sign usually has to be in person, but more often than not, if the product doesn't suck or isn't marginal utility for the price, decision makers just cut a PO after a conference call these days. Usually with performance terms.
Note carefully that there's LOT of marginally valued products out there. You'll be on a plane working hard to sell those. Every week.
It ain't hard to figure out the top brands and buy them in the Information Age. It's really rare I go into a sales pitch not knowing more about the company's products, services, and customer complaints as well as praises, than the sales person who demanded an in person meeting knows. What they know is how to whip out the
company credit card and take me and the others on my side of the table and the sales engineer (who I know lied about half of the time) out to dinner at a steak house. We decided before they ever walked in the door.
The largest IT purchases we made in the last three years were simply to hand over a credit card number to a cloud vendor and start setting up our stuff. We don't buy server hardware anymore. We knew the numbers a year out before we started. Three hours with a spreadsheet.
I'm sure we would enjoy the old school steak dinner if we needed a company jet. LOL. We'd still know what we were going to buy long before the pretty people with company polo shirts and matching khakis walked in the front door though, unless they decided to offer an in-person discount.
The number one way to get an Information Age range manager not to buy your product? Tell them you don't give pricing anytime except in person. Okay then, bye. You're off the list. Got vendors who'll quote me in email. No time for your BS. Really. Unless your product is literally taking the world by storm and you play goofy in person games, I'll be ordering from your competitors. It's unlikely your product is that good if I don't see people saying so online, unsolicited, and places your marketing staff probably don't know exist.
My dad's world was in person sales. My world that's a waste of my time and makes my company slower to become more efficient and get things done. Because if we play along, one of our competitors already bought the tech and is beating us with it.